Pretty much what the title says, still at 0/4 even after playing 4+ games.
It doesn’t count any type of game, only the Trial by Felfire Challenge mode. Just go in the singleplayer mode, select the latest story and play the Challenge mode if you don’t know where it is. Don’t even need to win, just play and even get beaten to get counted.
Hope i could help, in case you did the challenge mode then Blizzard should look into it. I too got confused and thought for a moment it was the latest Tavern Brawl, but then i read the quest better and realized the challenge mode has been finally added.